IXL - Complementary angle identities (Precalculus practice)

or

cos

(

x

)

=

–

0.4

.

If

x

and

y

are complementary, what is

sin

(

y

)

?

ref_doc_title.

or

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Not feeling ready yet? These can help:

Q.9Sine and cosine of complementary angles

R.5Find trigonometric ratios using right triangles

DD.5Complementary and supplementary angles